If I understand you correctly, you were able to take each experimental plane
and sample it in a the CFD data on the same plane? Now you would like to stack
your experimental planes together and interpolate it onto the CFD grid?
I haven't done this, so I'm not sure if it's going to work, but can't you do a
little preprocessing and then do the steps in reverse from before? What I mean
is:
1. Take all your experimental planes (u, v, w, x, y) at a given z and
concatenate the files together, adding the z coordinate at the end, to get (u,
v, w, x, y, z)
2. Load this into Paraview and use the TableToPoints filter
3. Load your CFD grid
4. Select your TableToPoints filter and do:
a. ResampleWithDataset -- select the TableToPoints as the input and the CFD
grid as the Source
This should then give you the data points from the experimental data
interpolated onto the CFD grid.
Does that seem like what you are trying to do?
Tim
________________________________
From: [email protected] <[email protected]> on behalf of Mike Tree
<[email protected]>
Sent: Thursday, December 1, 2016 2:30 PM
To: Gallagher, Timothy P
Cc: [email protected]
Subject: Re: [Paraview] Experimental Data Interpolate/Extrapolate to Custom
Volume Mesh
Tim,
I successfully used my experimental data planes to sample my CFD data for
comparison, but now I've got another procedure to tackle.
I am looking to interpolate between my experimental planes and fill in the
volumetric velocity data. I've spent significant time working with the
GaussianResample filter, but it seems to eliminate some of my data.
Specifically, GaussianResample can only interpolate scalars, so I have to
decompose my velocity vector into its components. This seems to work fine,
except that when the GaussianResample filter is applied the negative values of
these components are eliminated. Then, when I re-calculate my velocity vector
as a sum of the component it is obviously wrong because none of the components
are permitted to be negative.
Are there any other filters in existence that I can use for interpolation?
Any help will be most appreciated.
-Mike Tree
On Tue, Nov 8, 2016 at 9:42 AM, Mike Tree
<[email protected]<mailto:[email protected]>> wrote:
Tim,
Seems pretty straight forward. Thanks! I'll let you know if I have any issues.
-MT
On Mon, Nov 7, 2016 at 12:00 PM, Gallagher, Timothy P
<[email protected]<mailto:[email protected]>> wrote:
Mike,
Your state file doesn't work without the data files that go along with it.
That said, here is how you can do it:
1. Load your .dat file and use the TableToPoints filter to create points from
the data table -- select your x, y, z appropriately
2. Load your CFD data file
3. Select your CFD data file and then do:
a. ResampleWithDataset -- select the CFD data as the Input and the
TableToPoints as the Source
4. This will give you the data interpolated to the points in the table, if you
want a plane from this data, apply the Delaunay2D filter and select
Best-Fitting Plane (if the points are not X-Y points only).
That should give you the data from your CFD simulation on the same plane as
your PIV data.
I see you are at GT -- let me know if you are still unclear on these steps and
would like to talk in person.
Tim
________________________________
From: ParaView
<[email protected]<mailto:[email protected]>> on behalf
of Mike Tree <[email protected]<mailto:[email protected]>>
Sent: Tuesday, November 17, 2015 5:32 PM
To: [email protected]<mailto:[email protected]>
Subject: [Paraview] Experimental Data Interpolate/Extrapolate to Custom Volume
Mesh
I have three planes of experimental PIV data with velocity point data in .dat
format loaded in Paraview. I am hoping to use these planes to
interpolate/extrapolate velocity values onto a custom volumetric mesh (i.e.
from a CFD simulation) to compare experimental results with simulation results
in hopes of validating the simulation. I have attached my Paraview state file.
Any help will be much appreciated.
Thanks,
-MT
--
Mike Tree, PhD Student
Cardiovascular Fluid Mechanics Laboratory
Georgia Institute of Technology
Atlanta, GA
[email protected]<mailto:[email protected]>
678-249-0922<tel:678-249-0922>
[https://mailfoogae.appspot.com/t?sender=adHJlZW0yMkBnbWFpbC5jb20%3D&type=zerocontent&guid=82092feb-f151-4b75-8a88-41da2f2b684b]?
--
Mike Tree, PhD Candidate
Cardiovascular Fluid Mechanics Laboratory
Georgia Institute of Technology
Atlanta, GA
[email protected]<mailto:[email protected]>
678-249-0922<tel:(678)%20249-0922>
--
Mike Tree, PhD Candidate
Cardiovascular Fluid Mechanics Laboratory
Georgia Institute of Technology
Atlanta, GA
[email protected]<mailto:[email protected]>
678-249-0922
_______________________________________________
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